package com.gms.config;

import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginHandlerInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //登录成功之后，应该有用户的Session
        String loginUser = (String)request.getSession().getAttribute("username");

        if(loginUser==null){
            request.setAttribute("msg","没有权限，请先登录");
            request.getRequestDispatcher("/index").forward(request,response);
            return false;
        }
        return true;
    }
}